Assessment of the activation modalities of gastrocnemius lateralis and tibialis anterior during gait: A statistical analysis

Francesco Di Nardo, Giacomo Ghetti, Sandro Fioretti

Research output: Contribution to journalArticlepeer-review

Abstract

Aim of the study was to identify the different modalities of activation of gastrocnemius lateralis (GL) and tibialis anterior (TA) during gait at self-selected speed, by a statistical analysis of surface electromyographic signal from a large number (hundreds) of strides per subject. The analysis on fourteen healthy adults showed a large variability in the number of activation intervals, in their occurrence rate, and in the on-off instants, within different strides of the same walk. For each muscle, the assessment of the different modalities of activation (five for muscle) allowed to identify a single pattern, common for all the modalities and able to characterize the behavior of muscles during normal gait. The pattern of GL activity centered in two regions of the gait cycle: the transition between flat foot contact and push-off (observed in 100% of total strides) and the final swing (67.1 ± 15.9%). Two regions characterized also the pattern of TA activity: from pre-swing to following loading response (100%), and the mid-stance (30.5 ± 15.0%). This "normality" pattern represents the first attempt for the development in healthy young adults of a reference for dynamic EMG activity of GL and TA, in terms of variability of on-off muscular activity and occurrence rate during gait.

Original languageEnglish
Pages (from-to)1428-1433
Number of pages6
JournalJournal of Electromyography and Kinesiology
Volume23
Issue number6
DOIs
Publication statusPublished - Dec 2013

Keywords

  • Ankle flexor muscles
  • EMG
  • Gait analysis

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology

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